PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

10-12psi... MAF or 2bar SD?!

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Old Feb 22, 2016 | 02:11 PM
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Default 10-12psi... MAF or 2bar SD?!

Getting close to finishing my build. Its a stock 1999 5.3 LS from a silverado. Swapped to an Fbody oil pan, blue LS6 valve springs. I'm working on the OEM harness to work as a standalone for my 87 firebird.

I hear conflicting info about using a MAF for forced induction. My plan was to delete the MAF and I added a new IAT sensor in the EGR block off plate. Ive upgraded to a 2 bar MAP sensor and I have HPT pro. I'm still in the process of cutting and shortening but I did cut out the MAF already. I can easily splice it back in. Ive got a torqstorm supercharger installed with the smallest pulley and I should see 10-12psi on the stock 5.3 (prob more like 10-11psi). As well as 72lb Bosch injectors from FIC. This car will be mainly street driven as a fun car in only warm weather. Since the motor is basically all stock minus the supercharger I would love to make my life easier for tuning as well as driveability.

So whats the consensus? Is the MAF ok for this? or should I just say screw it and use a 2 bar operating system? I dont want to have to change the OP system and waste the credits. So if its too close to work then recomend the best/safest option.

Also can the MAF be mounted at the SC fresh air inlet vs in the charge pipe?

Lastly when converting from MAF to SD how and what tables need to be converted? i used to tune alittle in the 87 TPI ECMs back in the day with Moates stuff but this is a whole new level.
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Old Feb 23, 2016 | 04:00 PM
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I would go 2 bar SD and not worry about it.
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Old Feb 23, 2016 | 06:55 PM
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2 bar map sensor.
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